Diamond Manufacturing Company
Perforated and Value Added Metal Specialists

Return to Tolerances & Options

Burr

Shear Burr

Burr height is determined by taking the difference of the measurement of the thickness of the material with and without the burr. These measurements should be taken reasonably close to each other so that they are not influenced by any variation in the thickness of the material. The following are acceptable burr heights under normal perforating and shearing conditions.

Shear burr

Hole Burr

Hole burr

A burr is a slight draw of material. It occurs on the bottom side as a result of separating material during perforating and shearing when applicable. If roller leveled, hole burrs may end up being pushed back into their hole during roller leveling causing the holes to look less clean. Shear burrs, unless otherwise specified, may occur on the opposite side of hole burrs due to production methods.

Burr Height (Max.)
Diamond StandardDiamond Superior
Material ThicknessHole and ShearHoleShear
30GA to 24GA.003".003".003"
24GA to 16GA.005".003".005"
16GA to 1/8".006".003".005"
1/8" to 1/4".008".003".005"

REMINDER: Unless Diamond Superior is specified, Diamond Standard tolerances are supplied.

Diamond Manufacturing Company

Diamond Manufacturing is a wholly owned subsidiary of Reliance Steel & Aluminum Co.

Reliance Steel & Aluminum Co.

Site designed and developed by Blair Inc.

Site designed and developed by Blair Inc.